Gravity, Particles And Space-time

A gauge-invariant theory of motion of charged test particles, D. Chruscinski and J. Kijowski; Heisenberg picture for quantized fields interatcting with nonstationary electromagnetic or gravitational background, A. A. Lobashov and V. M. Mostepanenko; general relativity as a gauge theory of orthogonal groups in three dimensions, M. Raiteri et al; quantum spacetime , D. Fikelstein et al; Jacobi's principle and Hertz' definition of time, H-J Treder et al; placing limits on Cartan's torsion from non-Reimannian crystals, L.C. G. de Andrade; spinors as differential forms and applications to electromagnetism and quantum mechanics, W. A. Rodrigues and J. Vaz; black holes, time arrow and vacuum in quantum electrodynamics, M. E. Gertsenstein; one-loop background calculations in the general field theory, P. I. Pronin and K. V. Stepanyantz; energy-momentum superpotential in gravitation theory, G. Giachetta and G. Sardanashvily.